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Old 30th October 2008, 03:27 PM   #1
hemos is offline hemos  Canada
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Default Wiring series and then parallel with switch

Hi guys,

Just decided to use 5x 6V SLA batteries in a portable setup I am building. I'm using the batteries at 30V but I would like to charge them at 6V using my SLA charger. I can't find any SLA charger made for 30V battery packs.

I'm wondering if any of you would be kind enough just to draw me the schematic I would need to build in order to be able to switch from series to parallel on these batteries.

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Old 30th October 2008, 03:45 PM   #2
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Jerome Industries makes 15-cell (30V) lead acid chargers.

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Old 31st October 2008, 02:38 PM   #3
hemos is offline hemos  Canada
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Tried emailing them and got no luck... I'll try to give them a call and see if they would sell me only 1 unit.
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Old 2nd November 2008, 01:05 AM   #4
star882 is offline star882  United States
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What about build your own charger? It isn't that difficult for lead acid. All you need is a current limited supply switchable between two voltage limits. Just start by charging to 2.4v per cell under current limit, hold the voltage for a preset time when reached, and then fall back to 2.3v per cell.
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
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Old 17th November 2008, 01:34 AM   #5
hemos is offline hemos  Canada
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If anyone have some spare time, I would be interested to purchase a custom made SLA charger for my 30V battery pack.

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